ML20205A785

Rept on Discharge Monitoring at Diablo Canyon Power Plant, Feb 1987

ML20205A785
Person / Time
Site:	Diablo Canyon
Issue date:	02/28/1987
From:	Thornberry R PACIFIC GAS & ELECTRIC CO.
To:	Kenneth Jones CALIFORNIA, STATE OF
References
NUDOCS 8703270491
Download: ML20205A785 (36)

Text

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i PACIFIC GAS AND ELECTRIC COMPANY NUCLEAR PLANT OPERATIONS 1

P I

i REPORT ON 4

DISCHARGE MONITORING AT DIABLO CANYON POWER PLANT DURING THE MONTH OF i

FEBRUARY 1987 l

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TABLE OF CONTENTS Page Overview...........................

1 Summary of Monitoring Program 1

A - Monitoring of Plant Influent and Effluent B - Monitoring of Receiving Waters Appendix 1 - Influent and Effluent Monitoring for February 1987

- Form Q-2 Appendix 2 - 35mm Slides of Aerial Kelp Photography Taken February 20, 1987 Appendix 3 - Surface Water Temperatures - February 5,1987 Appendix 4 - Stratified Water Temperatures - February 3-4, 1987 Appendix 5 - pH and Dissolved Oxygen of the Receiving Waters, February 3-4, 1987

OVERVIEW During the month of February, discharges were made from Discharge Paths 001 (main circulating pumps), 001A, 0018, 0010, 001E, 001F, 001G, 001H, 001J, 001K, 001L, 001N, 001P, and 002 through 013.

No discharges were made from Discharge Paths 001C, 0011, and 001M.

The Board staff was informed that on February 3 results of Grease and Oil (G&O) analysis of the Oily Water Separator 001F indicated a concentration of 30 ppm. By 0310 on February 4 the G&O was down to 20 ppm but Non-Filterable Residue (NFR) had reached 292 ppm. Within six hours both NFR and G&O in Discharge 001F, were down to 18 and 4 ppm, respectively. The source of contamination has not been determined. Twenty-four hours elapsed from the first out-of-specification to the time both analyses were back within limits.

The discharge continued during this time, however, concentrations continued to dramatically decrease with each subsequent sample.

The Board staff was informed that on February 18 the OWS Discharge 001F sample had a G&O analyses result of 23.2 ppm. The discharge was terminated by re-routing the flow to the waste pond. The discharge continued for approximately seven hours prior to re-routing. The source of the oil is undetermined.

The Board staff was informed that on February 19 the Unit 2 Condensate Polisher Sump overflowed into the yard drain system as a result of a flow control valve being opened on the High Conductivity Tank during filling.

It is suspected that the toggle was accidentally flipped by construction activities nearby. The valve was open for approximately ten minutes.

The regenerant liquid flowed into the Condensate Polisher Sump which is normally pumped to the Unit 2 Turbine Building Sump (TBS).

The pumps from the Unit 2 to Unit 1 TBS were undergoing maintenance. Therefore, the pumps from the polisher sump to the TBS were secured. This caused the flow into the Condensate Polisher Sump to overflow. The overflow water was sampled and analyzed, and the results were within discharge limits. Although the water did reach yard drains to Discharge Path 005, no finw was seen entering the ocean.

The Board staff was informed that on February 25 the domestic sewage system overflowed at Pump Station 10A, The overflow was caused by misalignment of valves due to operator error. The bulk raw sewage flowed onto the ground but did not reach drains leading to the ocean. The area was cleaned up using a vacuum truck and was then washed down with water which subsequently flowed into the ocean through Discharge 005. The intertidal area around the discharge point was examined and there were no adverse environmental effects observed.

r At the request of the Regional Board staff, the following information supplements the January report discussion of Turbine Building Sump operation. To prevent future solubilization of materials in the sump, coordination of departments will be initiated to prevent high energy water from being routed into the Turbine Building Sump. This potential will be addressed in future work packages by the Work Planning Department who will plan appropriate courses of action.

In all cases, chemical, radiochemical, and toxicity analyses were performed in accordance with chemical analysis procedures contained in the Diablo Canyon Power Plant, Units 1 and 2 Plant Manual, Volume 8, by State approved laboratories, or laboratories meeting the requirements specified in the California Regional Water Quality Control Board Central Coast Region " Standard Provisions and Reporting Requirements" dated January 25, 1985.

SUMMARY

OF MONITORING PROGRAM A.

Monitoring of Plant influent and Effluent 1.

Results of monitoring of plant influent and effluent.*

in February are reported on Form Q-2's found in Appendix 1.

2.

The static bioassay of Discharoe 001 are performed quarterly in January, April, July, and October.

B.

Monitoring of Receiving Waters J

1.

Ecolooical Studies at Diablo Canyon l

l Ecological studies in accordance with the Thermal Effects Monitoring Program (Provision D.4) continue.

2.

Sediment Analysis Sediment samples are collected in August.

l 3.

Aerial Photography of Kelp Beds Aerial photography (infrared film type 2443) of kelp beds in the vicinity of Diablo Canyon were taken February 20, 1987. Color transparencies of the photographs are included in Appendix 2 (Regional Board copy only).

4.

Surf ace Water Temperature Surface water temperatures measured February 5, 1987, are reported in Appendix 3.

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5.

Stratified Water Temperatures Stratified water temperatures measured February 3-4, 1987, are presented in _ Appendi x 4.

A map is included showing station locations.

6.

pH and Dissolved Oxygen of Receiving Waters Results of pH and dissolved oxygen monitoring conducted February 3-4, 1987, in the receiving waters are provided in Appendix 5.

Also included is a map of station locations.

7.

Incident Light Measurements incident light measurements are reported quarterly in reports submitted in January, April, July and October.

8.

In situ Bioassay Results of the Mussel Watch program will be reported to the Board directly from the California Department of Fish and Game in their periodic report for this program.

APPENDIX 1 Influent and Effluent Monitoring February 1987

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APPENDIX 2 35mm Slides.of Aerial Kelp Photography Taken February 20, 1987 (Regional Board Copy Only)

APPENDIX 3 Surface Water Temperatures February 5, 1987 l

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A towable electronic bathythermograph (TOWED-BT) was used for thermal plume mapping.

The TOWED-BT is a self-contained underwater unit. The TOWED-BT uses a platinum resistance, pressure independent temperature sensor. The sensor has a response time of.25 seconds, with an accuracy of i.05'C. An oil filled strain gauge pressure transducer accurate to.3% is used to determine depth of the instrument. Temperature and depth data are collected at 5 second intervals.

All data is recorded in internal IC memory.

The positions during the thermal plume mapping were determined with a Motorola MiniRanger III system. The MiniRanger III system is a range-range navigation system, with an accuracy of i 0.5 m when used with a data processor.

Data were retrieved after the test using a photomagnetic coupler and microcomputer. Temperature and position data were merged and surface isotherms were computer generated.

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APPENDIX 4 Stratified Water Temperatures February 3-4, 1987

Temperature profiles were collected at 12 stations offshore of Diablo Canyon (Figure 1).

An electronic bathythermograph (MICOM-BT) was used to collect temperature profile data. The MICOM-BT is a self-contained underwater unit. The MICOM-BT uses a platinum resistance, pressure independent temperature sensor. The sensor a response time of.25 seconds, with a accuracy of 1.050C.

A oil filled strain gauge pressure transducer accurate to.3% is used to determine the depth of the instrument. Temperature and depth data are reported in 1 meter intervals.

All data is recorded in a internal IC memory circuit. Data was retrieved after each cast using a photomagnetic coupler and microcomputer.

Reference temperatures were taken with a bucket and/or digital thermometer (NBS traceable).

Temperature Data for Stations 3A, 3B, and 3C will be included in next months' Monitoring Report.

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DIABIO CANYON POWER PLANT OCEANOGRAPHIC STATIONS STRATIFIED WATER TEMPERATURES FEBRUARY 3 1987 STATION 4A DEPTH TEMP (m)

(*F) 0.0 58.9 1.0 58.8 2.0 57.8 3.0 57.0 4.0 55.8 5.0 55.7 6.0 55.7 7.0 55.7 8.0 55.6 9.0 55.6 10.0 55.6 11.0 55.6 12.0 55.6 13.0 55.6 14.0 55.6 15.0 55.5 16.0 55.5 17.0 55.5 18.0 55.5 19.0 55.5 20.0 55.4 21.0 55.4 22.0 55.3 23.0 55.3 24.0 55.2 25.0 55.2 26.0 55.1 27.0 55.0 28.0 55.0 29.0 54.6 30.0 54.5 31.0 54.4 32.0 54.4 l

I

DIABLO CANYON POWER PLANT OCEANOGRAPHIC STATIONS STRATIFIED WATER TEMPERATURES FEBRUARY 3 1987 STATION 4B DEPTH TEMP (m)

(*F) 0.0 55.9 1.0 55.8 2.0 55.9 3.0 55.8 4.0 55.7-5.0 55.6 6.0 55.5 7.0 55.5 8.0 55.4 9.0 55.4 10.0 55.4 11.0 55.4 12.0 55.3 13.0 55.3 14.0 55.3 15.0 55.3 16.0 55.3 17.0 55.3 18.0 55.3 19.0 55.3 20.0 55.3 21.0

'55.3 22.0 55.3 23.0 55.3 24.0 55.2 25.0 55.3 26.0 55.3 27.0 55.2 28.0 55.2 29.0 55.2 30.0 55.1 31.0 55.1 32.0 55.1 33.0 55.1 34.0 55.0 35.0 55.0 36.0 55.0 37.0 55.0 38.0 55.0 39.0 55.0 40.0 54.8 41.0 54.8 42.0 54.7 43.0 54.6 44.0 54.6 45.0 54.4 46.0 54.3 47.0 54.3 r-. - - - -,

DIABLO CANYON POWER PLANT OCEANOGRAPHIC STATIONS STRATIFIED WATER TEMPERATURES FEBRUARY 3 1987 STATION 4C DEPTH TEMP DEPTH TEMP (m)

(*F)

(m)

(*F) 0.0 55.7 50.0 54.1 1.0 55.4 51.0 54.0 2.0 55.4 52.0 54.0 3.0 55.2 53.0 53.9 4.0 55.2 54.0 53.8 5.0 55.1 55.0 53.7 6.0 55.1 56.0 53.6 7.0 55.0 57.0 53.6 8.0 55.0 58.0 53.5 9.0 55.0 59.0 53.4 10.0 55.0 11.0 55.0 12.0 55.0 13.0 55.0 14.0 55.0 15.0 55.0 16.0 54.9 17.0 54.8 18.0 54.8 19.0 54.8 20.0 54.8 21.0 54.8 22.0 54.8 23.0 54.8 24.0 54.8 25.0 54.6 26.0 54.4 27.0 54.4 28.0 54.4 29.0 54.4 30.0 54.4 31.0 54.3 32.0 54.3 33.0 54.3 34.0 54.3 35.0 54.3 36.0 54.3 37.0 54.3 38.0 54.2 39.0 54.2 40.0 54.1 41.0 54.2 42.0 54.1 43.0 54.1 44.0 54.1 45.0 54.1 46.0 54.1 47.0 54.1 48.0 54.1 49.0 54.1

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DIABLO CANYON POWER PLANT OCEANOGRAPHIC STATIONS STRATIFIED WATER TEMPERATURES FEBRUARY 4 1987 STATION SA DEPTH TEMP (m)

(*F) 0.0 55.3 1.0 55.0 2.0 55.0 3.0 55.0 4.0 54.8 5.0 54.7 6.0 54.6 7.0 54.6 8.0 54.6 9.0 54.6 10.0 54.6 11.0.

54.5 12.0 54.4 13.0 54.1 14.0 53.9 15.0 53.7 16.0 53.5 17.0 53.5 18.0 53.4 19.0 53.4 20.0 53.4 21.0 53.4

DIAB 1D CANYON POWER PLANT 1

OCEANOGRAPHIC STATIONS STRATIFIED WATER TEMPERATURES FEBRUARY 4 1987 STATION 5B DEPTH TEMP (m)

(*F) 0.0 55.2 1.0 55.1' 2.0 55.1 3.0 55.1 4.0 55.1 5.0 55.1 6.0 55.1 7.0 55.0 8.0 55.0 9.0 55.0 10.0 55.0 11.0 55.0 12.0 54.9 13.0-54.8 14.0 54.8 15.0 54.8 16.0 54.8 17.0 54.6 18.0 54.6 19.0 54.4 20.0 54.3 21.0 54.3 22.0 54.3 23.0 54.3 24.0 54.2 25.0 54.0 e

w-,

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DIABLO CANYON POWER PLANT OCEANOGRAPHIC STATIONS STRATIFIED WATER TEMPERATURES FEBRUARY.

4 1987 STATION SC DEPTH TEMP (m)

(*F) 0.0 55.2 1.0 55.2 2.0 55.2 3.0 55.1 4.0 55.1 5.0 55.1 6.0 55.0 7.0 54.9 8.0 54.9 9.0 54.9 10.0 54.9 11.0 54.8 12.0 54.8 13.0 54.8 14.0 54.7 15.0 54.7 16.0 54.6 17.0 54.6 18.0 54.6 19.0 54.6 20.0 54.4 21.0 54.4 22.0 54.3 23.0 54.3 24.0 54.1 25.0 54.0 26.0 54.0 27.0 53.9 28.0 53.8 29.0 53.7

~30.0 53.6 31.0 53.6 32.0 53.6 33.0 53.6 34.0 53.6 35.0 53.6 36.0 53.6 37.0 53.6

DIABID CANYON POWER PLANT OCEANOGRAPHIC STATIONS STRATIFIED WATER TEMPERATURES FEBRUARY 3 1987 STATION 10 DEPTH TEMP (m)

(*F) 0.0 71.0 1.0 70.9 2.0 69.4 3.0 66.0 4.0 64.5 5.0 62.6 6.0 58.7 l

0 a

DIABLO CANYON POWER PLANT OCEANOGRAPHIC STATIONS STRATIFIED WATER TEMPERATURES FEBRUARY 3 1987 STATION 11 DEPTH TEMP (m)

(*F) 0.0 68.4 1.0 67.8 2.0 67.6 3.0 67.1 4.0 67.0 5.0 66.8 6.0 63.5 7.0 56.4 8.0 55.6 9.0 55.4 10.0 55.3 11.0 55.2 12.0 55.1

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i a

I

DIABLO CANYON POWER PLANT OCEANOGRAPHIC STATIONS STRATIFIED WATER TEMPERATURES FEBRUARY 3 1987 STATION 12 DEPTH TEMP (m)

(*F) 0.0 58.7 1.0 66.6 2.0 63.3 3.0 59.8 4.0 56.6 5.0 56.4 6.0 56.3 7.0 55.9 8.0 55.8 9.0 55.6 10.0 55.5 11.0 55.5 12.0 55.4 13.0 55.3 14.0 55.1 15.0 55.1

APPENDIX 5 pH and Dissolved Oxygen of the Receiving Waters February 3-4, 1987

Dissolved oxygen and pH levels were measured at 12 stations offchsra cf Diablo Canyon (Figure 1). A hydrocast array of Frautschy bottles was used to collect water samples to determine pH levels and dissolved oxygen concentrations. These samples were collected just below the surface, at mid-depth, and at 0.5 m above the bottom. The dissolved oxygen samples were immediately preserved with alkaline iodide azide and manganous sulfate.

Samples were then transported to the onsite oceanography laboratory for processing.

Dissolved oxygen concentrations were determined using a Standard i

Winkler Titration, Azide Modification Method. The pH measurements wer made with an Orion Model 407A pH meter.

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Figure 1 WATER TEMPERATURE, PH, AND DISSOLVED OXYGEN SAMPLE LOCATIONS

DIABLO CANYON POWER PLANT OCEANOGRAPHIC STATIONS pH DETERMINATIONS FEBRUARY 1987 STATION TOP MIDDLE BOTTOM 3A 7.8 7.8 7.8 3B 7.9 7.9 7.8 3C 7.8 7.8 7.8 4A 7.8 7.9 7.8 4B 8.0 8.0 7.9 4C 8.0 7.9 7.9 SA 7.9 7.9 7.9 SB 7.9 8.0 7.9 SC 7.9 7.9 7.9 10 7.9 8.0 8.0 11 7.9 8.0 8.0 12 7.9 8.0 8.0

DIABLO CANYON POWER PLANT OCEANOGRAPHIC STATIONS OCTOBER 1986 DISSOLVED OXYGEN CONCENTRATIONS STATION TOP MIDDLE BOTTOM 3A 8.1 8.1 8.2 3B 8.2 8.0 8.0 3C 7.9 7.2 7.0 4A 8.2 8.2 8.2 4B 8.6 8.0 8.2 4C 8.2 7.7 6.3 SA 8.7 7.8 6.6 SB 8.2 7.8 7.2 SC 7.7 7.8 6.8 10 7.7 7.6 7.8 11 7.6 7.8 8.0 12 7.6 8.4 8.2

PACIFIC-GAS AND E LE C T RIC C O M PANY DIABLO CANYON POWCR PLANT PO Box 56 Avila Beach. Californ:a 93424 *(805) 595-7351 ggggggggl e:m A C THORNBERRY M ANT MANAGER March 20, 1987 Mr. Kenneth R. Jones, Executive Officer California Regional Water Quality Control Board Central Coast Region 1102-A Laurel Lane San Luis Obispo, California 93401

Dear Mr. Jones:

Discharge Monitoring and Reporting Program Diablo Canyon Power Plant The monthly report for February 1987 of the Diablo Canyon Power Plant Discharge and Monitoring Program, in accordance with Order 85-101, NPDES No.

CA0003751 is enclosed.

I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted.

Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate and complete.

The information provided herein presents the observed results of the measurements and analyses required by the monitoring program, and is neither an assertion of the adequacy of any instrument reading or any analytical or measurement procedure.

I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.

Sincerely, D$ $

ROBERT C. THORNBERRY Enclosure RCT:cd I

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cc: California Department of Fish and Game Marine Resources Region 245 W. Broadway, Suite 350 Long Beach, California 90802 Regional Administrator, Region IX Environmental Protection Agency 215 Fremont Street

~ San Francisco, California 94105 Regional Administrator U. S. Nuclear Regulatory Commission Region 5 1450 Maria Lane, Suite 210 Walnut Creek, California 94596-5368 Mr. Ronald L. Ballard, Chief Environmental and Hydrologic Engineering Branch Division of Engineering Office of N: clear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, DC 20555 Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555 Chief, Marine Resource Branch California DeSartment of Fish and Game Resources Building 1419 9th Street Sacramento, California 95814

.